不同络合剂对化学镀法制备镍包铜复合粉末的影响

Effect of different complexing agents on nickel-coated copper compound powder prepared with chemical plating

利用化学镀的方法制备镍包铜复合粉末,考察柠檬酸钠、醋酸钠和乳酸3种络合剂对Ni/Cu包覆粉体的转化率、包覆效果及分散性的影响.分别采用扫描电子显微镜、EDS能谱仪、X射线衍射仪对镍包铜粉末的微观形貌和物相组成进行表征.结果表明:采用柠檬酸钠作为络合剂能使镍更好地包覆于铜粉表面,镍金属原子分数大于90%,并且具有良好的分散性.

Using the chemical plating method, the nickel-coated copper composite powder was prepared, and the effect of three complexing agents of sodium citrate, sodium acetate, and lactic acid on the conver- sion, coating and dispersion of Ni/Cu cladding powder was examined. The microstructure and composi- tions of nickel-coated copper powder were characterized by means of scanning electron microscope, EDS energy spectrometer and X ray diffractometer respectively. The result showed that, using sodium citrate as complexing agent, the best nickel-coated copper powder could be prepared, and the atomic percentage content of nickel could reach more than 90%, and had good dispersity.